[ovirt-devel] Where's MOM (on latest master)

[Martin Sivak]

> Are we / can we use systemd socket activation there?

That actually requires systemd specific code iirc (to take over the
standing by socket). I am actually wondering why the xml-rpc in 4.0.4
was fine and json-rpc in 4.0.6 is too slow.

Martin

On Fri, Nov 18, 2016 at 11:53 AM, Anton Marchukov <amarchuk at redhat.com> wrote:
> Hello All.
>
> Are we / can we use systemd socket activation there?
>
> Anton.
>
> On Fri, Nov 18, 2016 at 11:21 AM, Martin Sivak <msivak at redhat.com> wrote:
>>
>> What about making vdsm ready to answer connections when it returns to
>> systemd instead? I hate workarounds and this always worked fine.
>>
>> Martin
>>
>> On Fri, Nov 18, 2016 at 11:13 AM, Oved Ourfali <oourfali at redhat.com>
>> wrote:
>> > Seems like a race regardless of the protocol.
>> > Should you add a retry?
>> >
>> >
>> > On Nov 18, 2016 11:52 AM, "Martin Sivak" <msivak at redhat.com> wrote:
>> >>
>> >> Yes, because VDSM is supposed to be up (there is systemd dependency).
>> >> This always worked fine with xml-rpc.
>> >>
>> >> Martin
>> >>
>> >> On Fri, Nov 18, 2016 at 10:14 AM, Nir Soffer <nsoffer at redhat.com>
>> >> wrote:
>> >> > On Fri, Nov 18, 2016 at 10:45 AM, Martin Sivak <msivak at redhat.com>
>> >> > wrote:
>> >> >> This happens because MOM can't connect to VDSM and so it quits.
>> >> >
>> >> > So mom try once to connect and if the connection fails it quits?
>> >> >
>> >> >> We
>> >> >> discussed it on the mailinglist
>> >> >>
>> >> >>
>> >> >>
>> >> >> https://lists.fedoraproject.org/archives/list/vdsm-devel@lists.fedorahosted.org/thread/MZ7UJUWO5KFRDJJDNXX7VIYU5PWSXF62/
>> >> >> http://lists.ovirt.org/pipermail/devel/2016-November/014101.html
>> >> >>
>> >> >> This issue never happened with XML-RPC.
>> >> >>
>> >> >> Shira reported it as
>> >> >> https://bugzilla.redhat.com/show_bug.cgi?id=1393012
>> >> >>
>> >> >> Martin
>> >> >>
>> >> >> On Thu, Nov 17, 2016 at 7:42 PM, Yaniv Kaul <ykaul at redhat.com>
>> >> >> wrote:
>> >> >>> I've recently seen, including now on Master, the following
>> >> >>> warnings:
>> >> >>> Nov 17 13:33:25 lago-basic-suite-master-host0 systemd[1]: Started
>> >> >>> MOM
>> >> >>> instance configured for VDSM purposes.
>> >> >>> Nov 17 13:33:25 lago-basic-suite-master-host0 systemd[1]: Starting
>> >> >>> MOM
>> >> >>> instance configured for VDSM purposes...
>> >> >>> Nov 17 13:33:35 lago-basic-suite-master-host0 vdsm[2012]: vdsm MOM
>> >> >>> WARN MOM
>> >> >>> not available, Policy could not be set.
>> >> >>> Nov 17 13:33:39 lago-basic-suite-master-host0 vdsm[2012]: vdsm MOM
>> >> >>> WARN MOM
>> >> >>> not available.
>> >> >>> Nov 17 13:33:39 lago-basic-suite-master-host0 vdsm[2012]: vdsm MOM
>> >> >>> WARN MOM
>> >> >>> not available, KSM stats will be missing.
>> >> >>> Nov 17 13:33:55 lago-basic-suite-master-host0 vdsm[2012]: vdsm MOM
>> >> >>> WARN MOM
>> >> >>> not available.
>> >> >>> Nov 17 13:33:55 lago-basic-suite-master-host0 vdsm[2012]: vdsm MOM
>> >> >>> WARN MOM
>> >> >>> not available, KSM stats will be missing.
>> >> >>> Nov 17 13:34:10 lago-basic-suite-master-host0 vdsm[2012]: vdsm MOM
>> >> >>> WARN MOM
>> >> >>> not available.
>> >> >>> Nov 17 13:34:10 lago-basic-suite-master-host0 vdsm[2012]: vdsm MOM
>> >> >>> WARN MOM
>> >> >>> not available, KSM stats will be missing.
>> >> >>> Nov 17 13:34:26 lago-basic-suite-master-host0 vdsm[2012]: vdsm MOM
>> >> >>> WARN MOM
>> >> >>> not available.
>> >> >>> Nov 17 13:34:26 lago-basic-suite-master-host0 vdsm[2012]: vdsm MOM
>> >> >>> WARN MOM
>> >> >>> not available, KSM stats will be missing.
>> >> >>> Nov 17 13:34:42 lago-basic-suite-master-host0 vdsm[2012]: vdsm MOM
>> >> >>> WARN MOM
>> >> >>> not available.
>> >> >>> Nov 17 13:34:42 lago-basic-suite-master-host0 vdsm[2012]: vdsm MOM
>> >> >>> WARN MOM
>> >> >>> not available, KSM stats will be missing.
>> >> >>> Nov 17 13:34:57 lago-basic-suite-master-host0 vdsm[2012]: vdsm MOM
>> >> >>> WARN MOM
>> >> >>> not available.
>> >> >>> Nov 17 13:34:57 lago-basic-suite-master-host0 vdsm[2012]: vdsm MOM
>> >> >>> WARN MOM
>> >> >>> not available, KSM stats will be missing.
>> >> >>> Nov 17 13:35:12 lago-basic-suite-master-host0 vdsm[2012]: vdsm MOM
>> >> >>> WARN MOM
>> >> >>> not available.
>> >> >>>
>> >> >>>
>> >> >>>
>> >> >>> Any ideas what this is and why?
>> >> >>>
>> >> >>> _______________________________________________
>> >> >>> Devel mailing list
>> >> >>> Devel at ovirt.org
>> >> >>> http://lists.ovirt.org/mailman/listinfo/devel
>> >> >> _______________________________________________
>> >> >> Devel mailing list
>> >> >> Devel at ovirt.org
>> >> >> http://lists.ovirt.org/mailman/listinfo/devel
>> >> _______________________________________________
>> >> Devel mailing list
>> >> Devel at ovirt.org
>> >> http://lists.ovirt.org/mailman/listinfo/devel
>> >>
>> >>
>> >
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>
>
>
>
> --
> Anton Marchukov
> Senior Software Engineer - RHEV CI - Red Hat
>